What is viscosity?

The characteristic of viscous is known as viscosity. Something viscous is sticky or pasty, differing from other states such as solid or liquid.

In this sense, it should be noted that something viscous is also usually related to the term mucus, since both concepts make it clear that the element they refer to is characterized by being slippery, sticky and also glutinous. Among the more viscous products would be from gelatine, various types of soaps, shampoos, gels and other beauty products. It should also be noted that there is a toy that is characterized by its viscosity and that it has been the playmate of many children for decades. Specifically, we are referring to blandiblu, a polymer that is characterized by being a “mass” of different colors that can be molded to the taste of each person to form all kinds of figures. It is also used by the smallest of the house to use it as a “weapon” in fun battles with friends.

This viscous play dough appeared in 1976 thanks to the Mattel company and caused a great stir in the children’s world, and especially in the 80’s when it became one of the most sought after entertainments for children. Viscosity is used to refer to the counterforce that a fluid exerts when faced with tangential deformation. It is a property characterized by the resistance to flow that is generated from the friction between molecules. Since all known fluids have some level of viscosity, the hypothetical fluid with no viscosity (that is, with zero viscosity) is known as the ideal fluid. More specifically, we can establish that viscosity is the main trademark that identifies each of the existing lubricants. Furthermore, in this case, in order to carry out the classification of said lubricants based on it, it must be determined that it is clearly determined by both temperature and pressure. Viscosity is observed by the friction that occurs between successive layers of a fluid. When dragging the surface of a fluid, the lower layers move slower than the surface as they are affected by tangential resistance. Viscosity therefore manifests itself in fluids in motion (where tangential forces come into play) When the viscosity is very high, friction between adjacent layers is pronounced and motion is therefore weak. The viscosity of fluids is measured through the viscosity coefficient, a parameter that depends on temperature. The physical unit of dynamic viscosity is called the pascal-second, according to the International System of Units.

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Equilibrium, on the other hand, is the unit of the cegesimal system of dynamic viscosity units. The name was created in honor of the French scientist Jean Louis Marie Poiseuille. Kinematic velocity, finally, is the relationship between dynamic viscosity and density. Its physical unit in the cegesimal system of units is known as the stoke, while in the SI it is the square meter/second.

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